36results about How to "Lower effective resistance" patented technology

A resonator for magnetic resonance applications has a conductor element that extends from a first conductor end to a second conductor end. During operation of the conductor element at a resonance frequency, a resonance current oscillates from the first conductor end to the second conductor end and back. The conductor ends are coupled with one another via a circuit that tunes the conductor element to the resonance frequency. The conductor element is fashioned as a multi-layer conductor with a number of layers that exhibit layer ends at the conductor ends. The circuit causes layer currents that are of different magnitudes among one another to flow in the layers during operation of the conductor element at the resonance frequency.

Linearity of an RF/microwave power amplifier is enhanced by an amplitude and phase distortion correction mechanism based upon signal envelope feedback, that operates directly on the RF signal passing through the power amplifier. A phase-amplitude controller responds to changes in gain and phase through the RF/microwave power amplifier signal path caused by changes in RF input power, DC power supply voltages, time, temperature and other variables, and controls the operation of a gain and phase adjustment circuit, so as to maintain constant gain and transmission phase through the RF/microwave power amplifier.

Provided is an electrical fault protection device comprising: a housing having supply terminals and output terminals; internal conductors passing between the supply terminals and the output terminals via at least one fault protector relay contact; a fault protector operably connected to the at least one fault protector relay contact and responsive to a fault to open the at least one fault protector relay contact; an aperture defined in the housing so as to facilitate the feeding of at least two external supply conductors through the housing; a contactor driven from the output terminals, the contactor incorporating at least one normally open contact corresponding to a respective external supply conductor, wherein a current rating of the at least one contactor contact is substantially greater than a current rating of each of the at least one fault protector relay contact.

A method for cooling power electronics circuits, in which a printed circuit board is produced according to a prescribed circuit board process and is populated with at least one power electronics components. Contact connecting at least one location on at least one metallic conductor track running on a surface of the printed circuit board that includes at least one metal element, which is both electrically conductive and heat-conductive and the physical height of which is designed to be at least as large as that of the at least one power electronics component. A cooling plate is placed in a planar manner onto the at least one power electronics component and/or the at least one metal element.

A piezoelectric vibrating reed includes a piezoelectric plate made of a piezoelectric material, a pair of exciter electrodes formed on outer surfaces of the piezoelectric plate and configured to vibrate the piezoelectric plate when a predetermined voltage is applied thereon, and a pair of mount electrodes electrically connected to the pair of exciter electrodes, respectively. One mount electrode in the pair of mount electrodes is formed on one surface (under surface) of the piezoelectric plate and the other mount electrode is formed on the other surface (top surface) of the piezoelectric plate in a state not to oppose the one mount electrode with the piezoelectric plate in between. Accordingly, not only can power be saved, but also higher performance can be achieved by lowering the R1 characteristic and thereby enhancing the vibration characteristic.

An ESD protection device includes a semiconductor substrate, a first well, a second well, a third well, a first doping region, a second doping region, a second doping region, a third doping region and a fourth doping region. The first well and the second well have a first conductivity, and the third well has a second conductivity. The first doping region having a first conductivity is disposed in the first well. The second doping region having a second conductivity is disposed in the third well, and the first and the second doping regions are isolated from each other. The third doping region and the fourth doping region have a first conductivity and a second conductivity, respectively. The second doping region and the third doping region are electrically coupled. The first well, the second well, the third well and the fourth doping region form a parasitic SCR.

A system and method is disclosed for providing a self heating adjustable titanium disilicon (TiSi₂) resistor. A triangularly shaped layer of polysilicon is placed a layer of insulation material. A layer of titanium is applied over the polysilicon and heated to form a layer of C49 type of TiSi₂. A current is then applied to the small end of the triangularly shaped layer of C49 TiSi₂. The current generates heat in a high resistance portion of the triangularly shaped layer of C49 TiSi₂ and converts a portion of the C49 TiSi₂ to C54 TiSi₂. The lower resistance of the C54 TiSi₂ decreases the effective resistance of the resistor. A desired value of resistance may be selected by adjusting the magnitude of the applied current.

Cage rotor (1) comprises: a rotor core (2) which extends in an axial direction from a first axial end (4) to a second axial end (5) along an axis of rotation and has the coated plates in the axial direction; a short circuit ring which surrounds the rotational axis and which is disposed at the first axial end; and an additional short circuit ring which surrounds the rotational axis and which is arranged at the second axial end. The short-circuit ring and the additional short ring comprise a first material, in which the sheets respectively have first punching. Cage rotor (1) comprises: a rotor core (2) which extends in an axial direction from a first axial end (4) to a second axial end (5) along an axis of rotation and has the coated plates in the axial direction; a short circuit ring which surrounds the rotational axis and which is disposed at the first axial end; and an additional short circuit ring which surrounds the rotational axis and which is arranged at the second axial end. The short-circuit ring and the additional short ring comprise a first material, in which the sheets respectively have first punching, which forms the edges of the grooves of the rotor core extending from the first axial end to the second axial end. The plates respectively have a second punching which forms the edges from a passage extending from the first axial end to the second axial end. The first punching is located in an outer region of the plates, and the second punching is in an inner region of the plates. The passage is filled with a filling material from the first material, which is integrally connected to the short-circuit ring, and the additional short-circuit ring. Independent claims are also included for: (1) an electrical machine (50), comprising a squirrel-cage rotor; (2) producing a squirrel-cage rotor comprising receiving the filler material at least partially through the passage to the second axial end; and (3) series of electrical machines, comprising at least one first electrical machine, which comprises a first cage rotor and at least one second electrical machine, where the second electrical machine having a squirrel-cage version with a rotor core variant comprising a first punching and second punching. The plates edges of grooves of rotor core variant, respectively form first punching which extend from a first axial end of the rotor core variant to a second axial end of the rotor core variant, The edges from an open passage of the rotor core variant form the respective second punching of the plates, which runs from the first axial end of the rotor core variant for the second axial end of the rotor core variant.

The invention discloses a current transformer, which is capable of solving the problem of temperature rise of a primary copper conductor due to a skin effect. The current transformer comprises a primary coil and two primary wiring boards, wherein the primary coil is formed by combining a cylindrical conducting rod and a tubular conducting tube sleeving the cylindrical conducting rod; each wiring board is L-shaped and comprises a connecting arm and a flat wiring board; a connection hole is formed in the upper end of each connecting arm; and the primary coil is connected with the wiring boards through the corresponding connection holes.

Various articles and devices can be manufactured to take advantage of a what is believed to be a novel thermodynamic cycle in which spontaneity is due to an intrinsic entropy equilibration. The novel thermodynamic cycle exploits the quantum phase transition between quantum thermalization and quantum localization. Preferred devices include a phonovoltaic cell, a rectifier and a conductor for use in an integrated circuit.

The invention discloses a single special-shaped efficient energy-saving electric wire with changed section perimeter. Effective resistance of a circular wire is increased by the skin effect of the alternating current, according to the newly discovered theory that the allowed largest current in a conductor is in direct proportion to the section perimeter of the conductor, the section perimeter of the wire needs to be increased while the sectional area of the wire is unchanged, the section perimeter of the elliptical wire is larger than the circular wire with the same section, so that the circular wire is changed into the elliptical wire. Due to the fact that the section perimeter and the surface area of the elliptical wire are increased, effective resistance is reduced, conductivity of the wire is increased, conducting efficiency of the wire is increased, and the wire has significant economical and social benefits.

The invention relates to the technical field of AC power distribution management, and discloses a pre-tightening line management device based on a machine room AC power distribution cabinet, which comprises a cabinet body, a control groove is arranged in the cabinet body, a connecting pipe is fixedly inserted in the cabinet body and located at the right end of the control groove, and the left end of the connecting pipe is fixedly connected with a fixed block. A sensing block is fixedly connected to the bottom end in the fixing block, and a fixing frame is fixedly connected to the left end of the control groove in the cabinet body. A magnetic field is generated around an induction block, the magnetic force of a first magnetic block is increased, the repulsive force between the first magnetic block and a second magnetic block is increased, at the moment, the second magnetic block drives a clamping block to move upwards through a connecting rod, the clamping block pushes a flow control rod, the flow control rod pushes a contact to move upwards along a resistor strip, and effective resistance flowing through the resistor strip is reduced; the current in the circuit is increased, so that the insufficient voltage in the circuit is compensated, and the effects of automatically adjusting the voltage and being safe to use when the voltage in the circuit is insufficient are achieved.

An inductor having a helicoidal shape is provided on an insulation film formed on a semiconductor substrate. A conductive thin layer (a plating layer) is provided on a surface of the inductor. A conductivity of the conductive thin layer is higher than that of the inductor. According to the constitution, a Q value can be improved, and a large volume of current can be flowed.